应邀: at sb's invitation, on invitation...
湿度: humidity level...
补课: to make up missed lesson, to reschedule a class...
要素: essential factor, key constituent...
皆: all, each and every, in all cases...
好家伙: my God!, oh boy!, man!...
诈骗: to defraud, to swindle, to blackmail...
威力: might, formidable power...
救: to save, to assist, to rescue...
适宜: suitable, appropriate...
